I have a layer with a few lines. They look very smooth in general, but there is a sharp edge at the start/endpoint of the line. Hot to eliminate that and get the blue dotted result line there?

How to smooth the line to get the smooth(blue) transition?

  • 1
    Do you want to alter the geometry, or is this a display issue?
    – Erik
    Nov 26, 2020 at 14:05
  • It's just a display issue.
    – POGO
    Nov 26, 2020 at 14:06
  • 5
    try geometry generator and use smooth($geometry) - see explanation in the expression editor for more optional settings
    – Babel
    Nov 26, 2020 at 14:11

1 Answer 1


Apart from geometry generator with expression smooth($geometry), there are different smoothing tools available in QGIS - best filter in the processing toolbox with the search-string smooth. There's a native QGIS tool as well as a SAGA line smoothing tool.

The following screenshot is made with the QGIS tool: red - original line, blue smoothed line. Adapt parameters to tweak results.

enter image description here

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